Pennsylvania Railroad class N1s

Pennsylvania Railroad N1s
PRR N1s #7246 at Youngstown, Ohio in 1919, when less than a year old. Note the Lines West central headlight (later relocated higher) and high slope-sided tender coal space
Type and origin Power type Steam Builder ALCO-Brooks (35), Baldwin Locomotive Works (25) Build date 1918–1919 Total produced 60
Specifications Configuration: ​  • Whyte 2-10-2  • UIC 1'E1'h2g Gauge 4 ft 8+1⁄2 in (1,435 mm) Leading dia. 33 in (0.838 m) Driver dia. 62 in (1.575 m) Trailing dia. 36 in (0.914 m) Wheelbase Locomotive: 41 ft 11+1⁄2 in (12.79 m) Length 91 ft 4+5⁄8 in (27.85 m) Axle load 75,600 lb (34,300 kg; 34.3 t) Adhesive weight 351,000 lb (159,000 kg; 159 t) Loco weight 435,000 lb (197,000 kg; 197 t) Tender weight Empty: 86,800 lb (39,400 kg; 39.4 t); Loaded: 206,100 lb (93,500 kg; 93.5 t) Tender type 100 F 85 Fuel type Coal Fuel capacity 39,300 lb (17,800 kg; 17.8 t) Water cap. 9,600 US gal (36,000 L; 8,000 imp gal) Firebox: ​  • Grate area 79.9 sq ft (7.4 m2) Boiler pressure 215 psi (1.48 MPa) Cylinders Two Cylinder size 30 in × 32 in (762 mm × 813 mm) Valve gear Walschaerts Valve type Piston
Performance figures Maximum speed 35 mph (56 km/h) Tractive effort 84,890 lbf (377.61 kN) Factor of adh. 4.13
Career Locale Midwest (Illinois Indiana, Ohio) Retired by 1950 Disposition All scrapped

The Pennsylvania Railroad (PRR) N1s was a class of 2-10-2 "Santa Fe" steam locomotives built for the Pennsylvania's Lines West. 60 engines were built between December 1918 and November 1919, and worked heavy mineral freight to and from ports on the Great Lakes until their retirement in the late 1940s. All examples were scrapped by 1950.^[1]